p.1 #1 · M42->EOS adapters and the SMC Takumar 50/1.4
I ordered an AF-confirm M42 to EOS adapter from Roxsen. It has the little ridge in the back to push in the aperture switch.
I just received an SMC Takumar 50/1.4 and screwed on the adapter. There are 2 problems.
1) When you turn the aperture ring on the lens, a lever inside the mount also moves. This lever scrapes along the inside ridge of the adapter, making it almost impossible to change the aperture when the adapter is fully screwed on.
2) The lens is very difficult to focus to infinity with the adapter mounted. I can only get it to go out to about 1.2m. It doesn't look like the rear lens group is actually touching the adapter's ridge, but maybe the pressure the adapter is putting on the aperture lever is causing things to move around inside the lens.
What should I do? Are all the Pentax M42 lenses like this? If so, it seems that the roxsen adapter is pretty useless.
p.1 #2 · M42->EOS adapters and the SMC Takumar 50/1.4
Hi Sam, I have and use the same lens my adaptor is from Tago Tech Singapore the ridge pushing the pin down should stay clear of the lever. Actually by more than one mm. My suggestion if you are handy with a file provide the clearance or take it to a machinist to have the dia. enlarged, stay clear of the chip.
I will say the adaptor quality is poor and I have had bad experience with the same brand.
My lens is a SMC Takumar f1.8 considering its low value the results are top in fact better than current well known brand f1.4 50mm. On cropped sensors like my Canon 40D a perfect portrait lens, super sharp or just right fully open.
I hope this helps.
Cheers Manfred
p.1 #3 · M42->EOS adapters and the SMC Takumar 50/1.4
You should use the type of adapter with no rim, like the one on the left in the attached photo. Most of the more modern SMC Takumar lenses have a slider switch with M and A (or manual and auto) settings. When you put it on M, the aperture stops down as you turn the aperture ring. On the A setting, it doesn't stop down unless the aperture pin is depressed by the body (or adapter). You could either cut off the rim, or just get a new rimless adapter, and keep the rim adapter for any older pin-only M42 lenses that you happen to pick up.
Here's a couple of links to threads that discuss the problem.
p.1 #4 · M42->EOS adapters and the SMC Takumar 50/1.4
jcolwell wrote:
You should use the type of adapter with no rim, like the one on the left in the attached photo. Most of the more modern SMC Takumar lenses have a slider switch with M and A (or manual and auto) settings. When you put it on M, the aperture stops down as you turn the aperture ring. On the A setting, it doesn't stop down unless the aperture pin is depressed by the body (or adapter). You could either cut off the rim, or just get a new rimless adapter, and keep the rim adapter for any older pin-only M42 lenses that you happen to pick up.
Here's a couple of links to threads that discuss the problem.
p.1 #5 · M42->EOS adapters and the SMC Takumar 50/1.4
yeah, I don't have a confirmation chip for my Super-Tak either because the M-A switch is more useful... if a chipped adapter without a rim becomes available, someone please post.
p.1 #6 · M42->EOS adapters and the SMC Takumar 50/1.4
I've been using a rimless M42 to EOS adapter with focus-confirmation (FC) chip for over a year. I bought it on eBay from happypagehk in November 2006, and used it with an Adaptall 2 to M42 adapter on a variety of lenses (all since sold). I still use the M42 to EOS FC adapter with the odd oldie I try out, like the Montgomery Ward 28/2.8 lens I recently bought for $12 (really great colour, but awful flare - I think it's single coated - too bad I don't shoot B&W film anymore). There's at least two types of rimless M42 to EOS with FC on eBay right now.
p.1 #7 · M42->EOS adapters and the SMC Takumar 50/1.4
jcolwell wrote:
I've been using a rimless M42 to EOS adapter with focus-confirmation (FC) chip for over a year. I bought it on eBay from happypagehk in November 2006,
Things must have changed. I just received one from him and it is flanged.
p.1 #8 · M42->EOS adapters and the SMC Takumar 50/1.4
mh2000 wrote:
yeah, I don't have a confirmation chip for my Super-Tak either because the M-A switch is more useful... if a chipped adapter without a rim becomes available, someone please post.
ericcc1006 on e-bay sells the chromed-brass, flangless adapters with AF-confirm.
p.1 #9 · M42->EOS adapters and the SMC Takumar 50/1.4
I'm going to try filing this adapter down for now so that it won't be completely useless. What kind of file should I use? I'm going to put tape over the AF-conf chip to keep it safe.
p.1 #10 · M42->EOS adapters and the SMC Takumar 50/1.4
Hi Sam, a very fine half round file will do it you need to be gentle this flange is very thin. Alternative use 180 grid wet & dry sand paper wrap it around a small file like a nail file mark the section , it should come out quickly.
take care not to bend the flange. Machinig the section would be best , if you have the time send the adaptor to me I can do it for you ( no charge I have toolmaking facilities ) As you can see I am in Australia but shipping in a padded envelope should be cheap enough.
Manfred
p.1 #11 · M42->EOS adapters and the SMC Takumar 50/1.4
I spent about an hour filing down the adapter. I'll still need to fix up some of the edges with a dremel or something, but it's at least working. I'm going to remove the ridge completely and just use the Auto/Manual switch for stopping down. It's a much better way to shoot.
The fit of the adapter itself is also a tiny bit loose, so it's easy to rotate it a bit and lose the connection with the camera (f/0). A note to anyone who wants an m42 adapter, avoid Roxsen.
p.1 #12 · M42->EOS adapters and the SMC Takumar 50/1.4
Sam N wrote:
A note to anyone who wants an m42 adapter, avoid Roxsen.
Their non-AF-confirm, chromed brass M42 adapters are perfect. They are all I ever buy/use.
The vendor I mentioned above (ericcc1006) sells the same chromed brass M42 adapter with AF-confirm chips on them. The one I tried (purchased for a lens mount conversion) worked great.
